Long-term investigations of post-Chernobyl radiocaesium in fallout and air in North Croatia
Title: Long-term investigations of post-Chernobyl radiocaesium in fallout and air in North Croatia
Author: Franić, Zdenko / Sega, Kresimir / Petrinec, Branko / Marović, Gordana
Reference: Environmental monitoring and assessment, 148 (1-4), p.315-323, Jan 2009
doi: 10.1007/s10661-008-0162-4
Keywords:
Abstract: The long-term behaviour of (137)Cs activity concentrations in air and fallout has been studied in the city of Zagreb for the post-Chernobyl period (1986-2006) as a part of an extended monitoring program of radioactive contamination of human environment in Croatia. Annual mean (137)Cs activity concentrations in air and annual total deposition fluxes (wet plus dry) decreased from 2.8 x 10(-4) Bq m(-3) in September 1986 to 3.0 x 10(-6) Bq m(-3) in last quarter of 2006 and from 6,410 Bq m(-2) year(-1) in 1986 to 2 Bq m(-2) year(-1) in 2006 respectively. By fitting the measured (137)Cs activity concentrations to the theoretical curve the ecological half-lives of (137)Cs in air and fallout were estimated with respective values of 0.46 and 0.54 years for immediate post-Chernobyl period, increasing to 5.52 and 3.97 years afterwards.
URL: http://www.ncbi.nlm.nih.gov/pubmed/18278563?dopt=Abstract
コメント